Access Point #: (Archived Access Point)

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Find the unknown number in an equation (+, - ) relating four whole numbers.


Essential Understandings


  • Identify the blank or symbol that represents a number (e.g., “n,” “x”)
  • Use manipulatives or a calculator to solve an equation (e.g., 3 + 2 = n + 1).
    º Solve one side of the equation (3 + 2 = n + 1, 5 = n + 1).
    º Determine the unknown number that makes the equation true (5 = n + 1, so n = 4).
  • Understand the following concepts, symbols, and vocabulary for unknown symbols, operations (+, -), equality.
  • Identify or draw a pictorial representation that matches the equation.
  • Solve the equation using a pictorial representation or numbers.

Number: Category: Access Points
Cluster: Use the four operations with whole numbers to solve problems. (Major Cluster)

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

Related Standards

Name Description
MAFS.4.OA.1.b: Determine the unknown whole number in an equation relating four whole numbers using comparative relational thinking. For example, solve 76 + 9 = n + 5 for n by arguing that nine is four more than five, so the unknown number must be four greater than 76.

Related Courses

Name Description
5012060: Mathematics - Grade Four
7712050: Access Mathematics Grade 4
5012015: Foundational Skills in Mathematics 3-5